feat: allow hermes user to trigger AI agent workflow

Add 'hermes' to the trusted issue creators and comment authors in the
workflow gate so the Hermes Agent can create issues and comment with
@mentions to trigger the AI agent pipeline.

.gitea/workflows/agent.yml

@@ -25,9 +25,10 @@ jobs:
     # Trusted author only, and only when a known agent is mentioned. This gate is the main
     # defense against malicious-issue prompt injection — do not loosen it.
     if: >
-      (github.event.comment == null && github.event.issue.user.login == 'ffaerber') ||
+      (github.event.comment == null && (github.event.issue.user.login == 'ffaerber' || github.event.issue.user.login == 'hermes')) ||
       (github.event.comment != null &&
        (github.event.comment.user.login == 'ffaerber' ||
+        github.event.comment.user.login == 'hermes' ||
         github.event.comment.user.login == 'pm' ||
         github.event.comment.user.login == 'junior' ||
         github.event.comment.user.login == 'senior' ||